library(ngram)
x <- "a b a c a b b"
ng <- ngram(x)
test <- babble(ng, seed=1234)
truth <- "b a c a b a c a b b c a b a c a b b b b c a b b a c a b b b a c a b a c a b a c a b b b b b b b a c a b a c a b b a b b b b a b b b a c a b a c a b a c a b b b a c a b b b b b b b b c a b a c a b b a b a c a b b b a c a b b a c a b a c a b b a c a b a c a b a c a b a c a b a c a b b a b a c a b a c "
stopifnot(all.equal(test, truth))
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